Home / 1,518.02-2,275.52-787.40

Finding the Fourth Proportional to 1,518.02, 2,275.52 and 787.40

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Solution

The fourth proportional to 1,518.02, 2,275.52 and 787.40 is: 1,180.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,518.02 : 2,275.52 = 787.40 : x
  2. Step 2: Convert to fraction form
    1,518.02/2,275.52 = 787.40/x
  3. Step 3: Cross multiply
    1,518.02x = 2,275.52 × 787.40
  4. Step 4: Simplify right side
    1,518.02x = 1,791,744.45
  5. Step 5: Solve for x
    x = 1,791,744.45/1,518.02
  6. Step 6: Final answer
    x = 1,180.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.